oh nifty project.. i make 6" cubed tanks.. i use 1/8" cell cast acrylic. it actually bows a bit when u fill it with water... some mind, some dont.. but it wont bust or anything...
i use weld-on 3 to seal the edges, using a syringe to apply it
i make the edges of my tank exactly 6x6x6"... if u make all your pieces 6.2", it'll come out funky.. if one edge is 6.2" tall, and u place it on top of the bottom sheet, it'll be 6.4". the back total width will be 6.2+.2+.2... sheet+front+back
when i make mine, the bottom sheet is 6x6x6,
front/back is 5 7/8"x6"
and the sides are 5 3/4"x5 7/8"
what will u use to cut the acrylic? i use a table saw with a plywood cutting blade
and use a router to smooth the edges.. the router is most important for clean edges.
i made this one for a friend
and this one with rounded edges:
oh yeah... i did some quick math... but if u want it to be 6x6x6" inside, u need...